Added an additional check to avoid any exceptions
Added an additional check to avoid any exceptions

yakumo/BotBuilder,stevengum97/BotBuilder,xiangyan99/BotBuilder,yakumo/BotBuilder,msft-shahins/BotBuilder,dr-em/BotBuilder,yakumo/BotBuilder,mmatkow/BotBuilder,yakumo/BotBuilder,msft-shahins/BotBuilder,mmatkow/BotBuilder,dr-em/BotBuilder,stevengum97/BotBuilder,stevengum97/BotBuilder,xiangyan99/BotBuilder,mmatkow/BotBuilder,msft-shahins/BotBuilder,dr-em/BotBuilder,xiangyan99/BotBuilder,xiangyan99/BotBuilder,mmatkow/BotBuilder,dr-em/BotBuilder,msft-shahins/BotBuilder,stevengum97/BotBuilder